This is all fake, she’s just pulling this as a stunt and somehow figures the troops will rally to save her, believe me, she wont exit this campaign come hell or high water. Power is everything to her.
It's not just the power. She gambled her whole life away with a gigolo as a partner so she could be the first female President ...she thinks she earned it is rightfully hers. No one bothered to tell her it doesn't work that way. It's been well documented that she would never even consider that she might not win.
It's a kind of mind game or justification for her life choices, it also shows that Bill's actions have greatly injured her as a person.